Electric bell-pull



U ITED STATES PATENT. OFFICE.

' AUGUSTUS s. BUNKER, or LAWRENCE, MASSACHUSETTS.

ELECTRIC BELL-PULL.

SPECIFICATION formingpart of Letters Patent No. 293,626, dated February19, 1884;

- Application filed November 26, 1883. (No model.)

3'0 all whom it may concern:

Be it known that I, AUGUSTUS S. BUNKER, a citizen of the United States,residing at Lawrence,in the county of Essex and State of Mas sachusetts,have invented certain new and useful Improvements in ElectricBell-Pulls; and I do hereby declare that the following is a full, clear,and exact description of the same, reference being had to the annexeddrawings, making a part .of this specification, and to the letters andfigures of reference marked thereon.

Figure 1 of the drawings is a side elevation of my invention, and Fig. 2a longitudinal section thereof.

The present invention has relation to certain new and usefulimprovements in electric bellpulls; and the object thereof is tosimplify this class of devices, whereby they will be less liable to getout of order, will work more easily, and may be manufactured and placedon the market at a comparatively small cost. These several objects Iattain by the construction substantially as shown in the drawings andhereinafter described and claimed.

In the accompanying drawings, A represents the spindle, provided at itsouter end with a suitable knob, a, or other equivalent device, foroperating the spindle to pull it out in the direction of the arrows,Fig. 2. The spindle A extends through a casing, B, cast with acircumferential flange, b, with holes through it to receive screws, bywhich it is attached to the j amb of the door or other obj ect. Locatedwithin the casing B, and coiled around the spindle A, is aspiral spring,0, re-

tained in position on the spindle by a pin, d, passing through the same.at a point beyond the inner end of the casing. Thus when the spindle ispulled out the spiral spring will be contracted between the pin andouter end of the casing, and when the knob isreleased the expansiveforce of the spring will cause the spindle to return to its normalposition. The

inner end of the spindle A is screw-threaded to receive and hold thereona button, 0, having its inner end conical or beveled, as shown at f. Tomore securely retain saidbutton in position on the spindle, I employ ajam-nut, e, screwed on the extremity of the spindle until it comes incontact with the end of the button, said nut being preferably round andof the same diameter as the button. The button 0 is both removable andadjustable on the spindle A, to adapt it to a shorter or longer pull.Around the inner end of the sleeve or casing B is placed and secured aninsulator, D, and to this insulator are connected the ends ofspring-arms E, of metal, and bent outward at an acute angle at theirfree ends, as shown at g, to conform to the bevel or conical surface ofthe button 0, so that when the spindle A is pulled in an outwarddirection the bevel surface, of the button will allow the angular endsof the spring-arms E to ride over it, and thus more perfectly makecommunication with the conducting-wires F, to complete the circuit withthe battery and cause the bell to ring. The employment of the casing Bcompletely shields the spiral spring 0, and prevents it from injury, aswell as from the dust and dirt that would work in between the coilsthereof.

The casing B has a further advantage, in that 4 .Hence space iseconomized between the escutcheon or flange and the knob, and the spindle being round instead of square, as is also the beveled button, thespindle can be readily turned upon its axis without affecting itsoperation, the button always being in position. to

be brought in contact with the spring-arms when the spindle is pulledout. The interior or inner face of the knoba is made beveled, so thatbut a single point around the spindlewill come in contact with the endof the casing, thereby leaving a sufficient space between the door-jamband knob to enable the fingers to grasp the latter in pulling the bell,thus dispensing with the usual neck or flange upon ,the inner side ofthe knob, and, as before stated, economizing space and enabling the'device to be connected to do'or-jambs of less thickness.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is

1. An electric bell-pull consisting of a casing east with acircumferential flange, a spring and spindle constructed substantiallyas described, and an insulator adapted to fit over the end of thecasing, substantially as and for the purpose set forth.

2. In an electric bell-pull, the combination, with a suitable casing andan insulator fitting over the end of the same, of a spindle having atone end detachably connected a beveled button, and at its opposite end abutton formed with a conical or beveled inner face, snbstantia-lly asand for the purpose set forth.

3. An electric bell-pull consisting of a cas-- ing cast with acircumferential flange or escutcheon and having connected to its innerend an insulator provided with curved or bent spring-arms andconducting-wires, and a spindle extending through the casing andinsulator, and having a spiral spring coiled around it, and provided atone end with a button formed with a conical or beveled face, and at theopposite end with a knob beveled outward upon its inner side from itscenter of axis, substantially as and for the purpose described.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

AUGUSTUS S. BUNKER.

Vitnesses:

JOHN E. BARR,

ALMERIN S. Coon.

